Three-dimensional Fermi-surface nesting in 1T-VSe2 studied by angle-resolved photoemission spectroscopy

Takafumi Sato; Kensei Terashima; Seigo Souma; Hiroaki Matsui; Takashi Takahashi; Hongbo Yang; Shancai Wang; Hong Ding; Nobuhiro Maeda; Koya Hayashi

doi:10.1143/JPSJ.73.3331

Three-dimensional Fermi-surface nesting in 1T-VSe₂ studied by angle-resolved photoemission spectroscopy

Takafumi Sato, Kensei Terashima, Seigo Souma, Hiroaki Matsui, Takashi Takahashi, Hongbo Yang, Shancai Wang, Hong Ding, Nobuhiro Maeda, Koya Hayashi

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

We have performed high-resolution angle-resolved photoemission Spectroscopy (ARPES) with synchrotron radiation on layered transition-metal dichalcogenide 1T-VSe₂ to study the mechanism of the three-dimensional charge-density-wave (CDW) transition. We found that the Fermi surface around the M(L) and K(H) points shows considerable wiggling along the wave vector normal to the layer (k_z) despite the apparently two-dimensional crystal structure. ARPES spectra below the CDW transition temperature show a signature of pseudogap opening at a specific k_z-region on the Fermi surface, demonstrating that the CDW transition of 1T-VSe₂ is driven by three-dimensional Fermi-surface nesting.

Original language	English
Pages (from-to)	3331-3334
Number of pages	4
Journal	journal of the physical society of japan
Volume	73
Issue number	12
DOIs	https://doi.org/10.1143/JPSJ.73.3331
Publication status	Published - Dec 2004
Externally published	Yes

Keywords

1T-VSe
Charge-density wave
Fermi surface
Photoemission

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.73.3331

Cite this

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title = "Three-dimensional Fermi-surface nesting in 1T-VSe2 studied by angle-resolved photoemission spectroscopy",

abstract = "We have performed high-resolution angle-resolved photoemission Spectroscopy (ARPES) with synchrotron radiation on layered transition-metal dichalcogenide 1T-VSe2 to study the mechanism of the three-dimensional charge-density-wave (CDW) transition. We found that the Fermi surface around the M(L) and K(H) points shows considerable wiggling along the wave vector normal to the layer (kz) despite the apparently two-dimensional crystal structure. ARPES spectra below the CDW transition temperature show a signature of pseudogap opening at a specific kz-region on the Fermi surface, demonstrating that the CDW transition of 1T-VSe2 is driven by three-dimensional Fermi-surface nesting.",

keywords = "1T-VSe, Charge-density wave, Fermi surface, Photoemission",

author = "Takafumi Sato and Kensei Terashima and Seigo Souma and Hiroaki Matsui and Takashi Takahashi and Hongbo Yang and Shancai Wang and Hong Ding and Nobuhiro Maeda and Koya Hayashi",

year = "2004",

month = dec,

doi = "10.1143/JPSJ.73.3331",

language = "English",

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T1 - Three-dimensional Fermi-surface nesting in 1T-VSe2 studied by angle-resolved photoemission spectroscopy

AU - Sato, Takafumi

AU - Terashima, Kensei

AU - Souma, Seigo

AU - Matsui, Hiroaki

AU - Takahashi, Takashi

AU - Yang, Hongbo

AU - Wang, Shancai

AU - Ding, Hong

AU - Maeda, Nobuhiro

AU - Hayashi, Koya

PY - 2004/12

Y1 - 2004/12

N2 - We have performed high-resolution angle-resolved photoemission Spectroscopy (ARPES) with synchrotron radiation on layered transition-metal dichalcogenide 1T-VSe2 to study the mechanism of the three-dimensional charge-density-wave (CDW) transition. We found that the Fermi surface around the M(L) and K(H) points shows considerable wiggling along the wave vector normal to the layer (kz) despite the apparently two-dimensional crystal structure. ARPES spectra below the CDW transition temperature show a signature of pseudogap opening at a specific kz-region on the Fermi surface, demonstrating that the CDW transition of 1T-VSe2 is driven by three-dimensional Fermi-surface nesting.

AB - We have performed high-resolution angle-resolved photoemission Spectroscopy (ARPES) with synchrotron radiation on layered transition-metal dichalcogenide 1T-VSe2 to study the mechanism of the three-dimensional charge-density-wave (CDW) transition. We found that the Fermi surface around the M(L) and K(H) points shows considerable wiggling along the wave vector normal to the layer (kz) despite the apparently two-dimensional crystal structure. ARPES spectra below the CDW transition temperature show a signature of pseudogap opening at a specific kz-region on the Fermi surface, demonstrating that the CDW transition of 1T-VSe2 is driven by three-dimensional Fermi-surface nesting.

KW - 1T-VSe

KW - Charge-density wave

KW - Fermi surface

KW - Photoemission

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